While colonic irrigation enjoyed a vogue in the early 20th century as a possible cure for numerous diseases, subsequent research showed that it was useless and potentially harmful.
Nevertheless, interest in colonic autointoxication as a cause of illness, and in colonic irrigation as a cure, enjoyed a revival in alternative medicine at the end of the 20th century.
The non-corporeal equivalent of colonic irrigation, with similar key advantages (renewed energy, sense of lightness, opportunity for endless icky proselytism that no one really wants to hear).